Malicious PDF — malware analysis report

Static analysis result for SHA-256 623912fae33c55ba…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 05:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 352c94b2dc67450991eefb41fa24cd12 SHA-1: b1fc1257b5df5758d296c44f50cc5b708aae9efb SHA-256: 623912fae33c55ba9ee162af791e328a00d168fb5cfd58a953c7c4f5a5928758
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically `https://ttraff.cc/pify`. The document body, though heavily obfuscated, contains text related to importing ICS files to Google Calendar, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=import+ics+file+to+google+calendar+android In PDF document text
    • http://files.bowieknifestudios.com/uploads/1/3/0/7/130738993/saguwununukabevoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/bengali_movie_durga_puja_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2347/3568/files/evenesence_lithium_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/98962788226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/10371155533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5467/6645/files/add_anaconda_to_path.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/pitosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/1773584352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/abdominal_aortic_aneurysm_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/streamline_english_directions_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/how_to_delete_discord_messages_fast.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 5200 bytes
SHA-256: a62f30590dc0925450838c02cf48ff0307402006041f27e4da223375c9b76e50
font_01_sfnt_off0000749a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 10316 bytes
SHA-256: 6905cad4a0ad5a6faacc384032a80edb32afdd93507a4a4b8dcf60e87570504c
font_02_sfnt_off000097ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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