Malicious PDF — malware analysis report

Static analysis result for SHA-256 704f16446010bd84…

MALICIOUS

PDF

46.0 KB Created: 2020-08-04 21:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df72931de698b6a6bb5863ccddbfad65 SHA-1: 4b0b8e7c5a9ea0b2816870c2b82b548eeb2911a8 SHA-256: 704f16446010bd84372c2d27cadfbe3455e1862f32c29753aa91d45ad0dad6cd
162 Risk Score

Malware Insights

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

This PDF file contains numerous links, many pointing to benign Shopify URLs, but one critical link leads to a known malicious redirector at 'https://ttraff.com/pify?keyword=angularjs+pdf+viewer+directive'. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking this malicious link. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious payload being delivered via the redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=angularjs+pdf+viewer+directive
    • http://files.primocelloceramics.com/uploads/1/3/0/8/130873822/nikenekipup.pdf
    • http://files.thelewisproject.org.uk/uploads/1/3/1/0/131070859/61145.pdf
    • http://files.singlespark.nl/uploads/1/3/0/8/130814774/jawagisisodigobevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/17603374696.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/writing_about_art_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/rakafegolojemazesiwiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/5063431247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/88328701637.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/60659772599.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/79512973461.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/my_side_of_the_mountain_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7587/8564/files/56502894172.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/jilixawuzazeregedefuvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/difolutenifax.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683f.bin
428ed413c216f6af76d8bcebccb0f9bbae535dc4b81014ecda45df28328d4b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5540 bytes
font_01_sfnt_off00007b4c.bin
fb51299a1bb2ea619d67fb07e8c417256396fbd342ce63d41eb35baef1f40d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4C 15344 bytes

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