Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6749369ab562a5…

MALICIOUS

PDF

42.7 KB Created: 2020-09-21 03:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 306c0d55299ec92b6bd74060c985feb4 SHA-1: a30639d38e1ff2f96edd75a78568f40d94a91f84 SHA-256: ff6749369ab562a5a7c81dcb85bcfecd66426d3c55e4fcc209a7d6460dccf569
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is used to distribute cracked software. The document body also contains the same lure text, 'Inshot pro apk cracked free download'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, some of which are also suspicious.

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.club/wix?keyword=inshot+pro+apk+cracked+free+download
    • http://renivo.yamatai-taiko.com/uploads/1/3/1/1/131164250/4b1df.pdf
    • http://files.mcscftirwin.org/uploads/1/3/0/7/130776368/2614243.pdf
    • http://zudanof.uky-com-critique.com/uploads/1/3/1/3/131380591/merirajabosuperukuwa.pdf
    • http://xurepis.secretsofmyvegankitchen.com/uploads/1/3/0/9/130969707/512ffa94897.pdf
    • https://e3444c42-450d-42f7-ad98-1323ac03f1e0.filesusr.com/ugd/bd5c68_90c63853a1be42ee84ef4924d950fb60.pdf?index=true
    • https://2759751d-a139-4a9d-b2c5-6e041688ff40.filesusr.com/ugd/ae15ca_cbd9e15211e34409b181cf4b51c223fe.pdf?index=true
    • https://4b2849f3-0bc9-462b-b3bb-448dc76526fc.filesusr.com/ugd/225520_3a7825ba0b794dabbba1d06bd2a046ef.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/jazomabewazikesoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/35878803123.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/adulthood_is_a_myth_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/88041241322.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/44621376887.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_off00006a5a.bin
77f3759128edbbf9367780a8a5a9181c5c8d1051e51e354cc64f3d7507e95f3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5A 5336 bytes
font_01_sfnt_off00007c8b.bin
aeb13a31aa3d0d4a49a995c851506127343017de47c6a41d4e2e85f42851a69a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 9904 bytes