Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eac142ca813a69e…

MALICIOUS

PDF

52.4 KB Created: 2020-08-02 19:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3315879582a2bee1910bc9fb602e39b1 SHA-1: 6a30423389f9df0f06bef5b15411dc0cd1ff7503 SHA-256: 7eac142ca813a69e35d94e2eb41a2db5a8613434393977d7cb2ff28cd96f5ab9
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=css+box+shadow+top', suggesting a lure to a malicious site. The presence of a PDF link farm further indicates malicious intent, likely for SEO poisoning or traffic redirection.

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.com/pify?keyword=css+box+shadow+top
    • http://files.ps971.com/uploads/1/3/0/9/130969059/fupijagorobi.pdf
    • http://files.makeupbykaseygolden.com/uploads/1/3/0/7/130775678/kevavoluvipinanido.pdf
    • http://files.rebeccakellyonline.com/uploads/1/3/2/8/132814030/likupagezupagik_ziguwaxoz_zuxupa_fagurujizuzivut.pdf
    • http://files.rebeccakellyonline.com/uploads/1/3/2/8/132814030/likupagezupagik_zigu
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/luvuwog.pdf
    • https://cdn.shopify.com/s/files/1/0437/4721/3464/files/86101150412.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/mofajasepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/3347136097.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/stihl_026_pro.pdf
    • https://cdn.shopify.com/s/files/1/0429/0484/6503/files/77336604499.pdf
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/24046108515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/rimud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/42967018907.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/98217767675.pdf
    • https://cdn.shopify.com/s/files/1/0435/9975/7474/files/2679118485.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_off00008177.bin
3e1ed60bd21a8e151c59b1eb9f58c6c25daf1b9379c6679378b1d5625045f342
pdf-font-stream PDF embedded font (sfnt) at offset 0x8177 5124 bytes
font_01_sfnt_off000092ee.bin
6e35dc53e1510bf3cb2fffbde331be9fa3a2571640250128f66e96fb71a0c29c
pdf-font-stream PDF embedded font (sfnt) at offset 0x92EE 15968 bytes