Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db70fa573b6d152…

MALICIOUS

PDF

65.9 KB Created: 2020-08-19 08:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 269bf6201efbeaee4dc6d91a3cc4d2b6 SHA-1: 2e47db86a7e6d3250ae7093e05065547b9ab9c0c SHA-256: 7db70fa573b6d152f005e1bd4d2cd6e04ca25188e6aefbd4b6f2d3270eb27311
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with one heuristic specifically identifying a malicious redirector URL (https://ttraff.cc/pify?keyword=chromeleon+7+user+manual+pdf). Another heuristic indicates a large number of external PDF links, suggesting a link farm for SEO poisoning or malware distribution. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the phishing or malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=chromeleon+7+user+manual+pdf
    • http://nemomovab.annadoeshair.com/uploads/1/3/1/4/131482933/vuguxi-dobaluxurog-sagokekavipi-papoti.pdf
    • http://files.featherlegsoutdoors.com/uploads/1/3/1/4/131454549/vevazozovozu.pdf
    • http://luvuriba.ajameskolar.com/uploads/1/3/2/7/132740873/kusotiwexaguxifalazu.pdf
    • http://namegeju.forgemd.com/uploads/1/3/0/7/130776394/wokipebowis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/gawawaworukelasiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/xeroraxanefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/20119574527.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/70963194489.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/nofixigekadijusedow.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/english_movies_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/9930512005.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/vipotijomagudurebebalar.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/41594782601.pdf
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/15426670339.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/roxevarunifewali.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/skripsi_kualitatif_akuntansi_perpajakan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3335/files/wufulokebuwebosazabe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd73.bin
62dfc0f202d4319d66e16ab7e96188f8b9d94c33d01cf51cfed5e492dfd83750		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD73 5264 bytes
font_01_sfnt_off0000cf30.bin
4ff7718caf26e680a812bd12a000462596c27544bbf61d9e2a8fc109fdcbf012		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF30 12736 bytes

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