Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42bab6188f22f65…

MALICIOUS

PDF

37.6 KB Created: 2020-08-05 10:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb7518981f60a71416056c89d5d81bae SHA-1: 7a5d4013f3cdf7b4fb64ce1ff4d27d4b34fab0a6 SHA-256: a42bab6188f22f650c0ca682c400a7503f7bb05576970a919f43d89d7b9d99f1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as ttraff.cc. This heuristic, combined with the ML classifier's high confidence, indicates the document is designed to redirect users to malicious content. No scripts were extracted from this sample, but the presence of numerous embedded URLs points to a delivery mechanism for further malicious payloads or phishing attempts.

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=alfabeto+italiano+per+stranieri+pdf In PDF document text
    • http://files.goodshepherdinoshkosh.com/uploads/1/3/0/7/130738755/wexiwexabij.pdfIn PDF document text
    • http://files.lingokoo.com/uploads/1/3/0/7/130739982/lasenuwovi.pdfIn PDF document text
    • http://files.nikkiwoods.com/uploads/1/3/0/8/130814187/mamisifeloriwoj-matasujutepa-dogig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/jolonerori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/20383160918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/besm_d20_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/19072855284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/muwijotixaladoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/quarterback_young_thug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/try_catch_sql.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/59981788403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/13433893257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/vifudevukifilemowovigav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/bootstrap_table_styles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/jivaluxu.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BE 5164 bytes
SHA-256: b3e5eb7fb560525c4b4d8a7754b50d29ce332e3f215d45c3ea34e2bb9c29366b
font_01_sfnt_off0000645a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 10972 bytes
SHA-256: 6c142149e5062e9537a9f64c316c8b21c9e8efb8ba8086916d01b0e7f19eb6b9

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