Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec71af9adb8cc73…

MALICIOUS

PDF

61.6 KB Created: 2020-09-10 23:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ecdb325a482c62e9427411419871ecf SHA-1: 6350b5def09fc8e86a0ae65a2bdcfc49d412bf42 SHA-256: cec71af9adb8cc73ec99028e953f61f722909facaf6a91e5c1126f5291545caf
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically directing to a malicious redirector disguised as a lure for 'candy crush mod apk for ios'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable phishing or malware distribution attempt. No scripts were extracted, but the document body and embedded URLs strongly suggest a social engineering attack.

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.link/wix?keyword=candy+crush+mod+apk+for+ios In PDF document text
    • http://files.cfc1stmardiv.com/uploads/1/3/2/6/132695492/defulavotumez-foxidoridujukaz.pdfIn PDF document text
    • http://biwoxariv.mhes-ses-bandstrings.com/uploads/1/3/0/7/130776132/83f9b973bfd75e6.pdfIn PDF document text
    • http://files.sanzeribaseball.com/uploads/1/3/1/3/131380024/e17d0d.pdfIn PDF document text
    • http://files.va-magdrl.org/uploads/1/3/1/3/131383607/senatusebej.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/1/0438/2598/7734/files/factorio_4_belt_balancer.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10cedf_7ab954bf67764f0492ccb5fe3b28aa8b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/610d21_357e299d21644a618ce87d5981c3b573.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_14d1c32501b84b78a09e82488be3788e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/cobalt_ore_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/bier_markt_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/scared_to_be_lonely_piano_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/gozetuwowatanofawabojowin.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 26028 bytes
SHA-256: 2017716377567b2ab463d4dc782babe51fbe7cd8e748a7e17b3a0a18965cc063
font_01_sfnt_off0000b2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DC 5436 bytes
SHA-256: a36adf249aac5d9630da80cf29650b2994f37ff05cf1a0e331c8cb5d447fc890
font_02_sfnt_off0000c538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC538 10392 bytes
SHA-256: c83cd331eab3534e3c441d60f40967ef0eb9a08d82188ce9253c7be542824d3d

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