Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c20ad3d26a2ac5…

MALICIOUS

PDF

47.1 KB Created: 2020-07-19 04:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2400babbd71659c4b2089e2c5834d806 SHA-1: c06b0aa766a5038b8d2dd5b2a43803dddc8bb2a2 SHA-256: f1c20ad3d26a2ac58b95004cd4f40e63e5e4e20bd226d7c4f68323c9f2700915
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to a link farm hosted on cdn.shopify.com, which ultimately redirects to a malicious domain (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to an 'application form'. The presence of a malicious redirector link and the sheer volume of outbound links indicate an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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/wb?keyword=friends%20with%20benefits%20application%20form%20pdf
    • http://files.leongraymusic.com/uploads/1/3/1/6/131636923/98ee0d3b087c0b8.pdf
    • http://files.small2big.co.uk/uploads/1/3/1/6/131606550/fixeloranuba.pdf
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/kumizawodukabugulenezal.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/kubezewedolumavetoluki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://pemorezi.files.wordpress.com/2020/06/wagifiduzitokebukuv.pdf
    • https://sebowola522044951.files.wordpress.com/2020/06/tefow.pdf
    • https://napipavuk.files.wordpress.com/2020/06/26049329332.pdf
    • https://nutumomox.files.wordpress.com/2020/06/dibiwetifobikamazu.pdf
    • https://vurezonu.files.wordpress.com/2020/07/muxirumuzalofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/lajuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/82975339210.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/98902356210.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/59895035655.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30812088679.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/50235879741.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/74366772402.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1638/files/91614038242.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_off00007aaf.bin
4a5c56bf8bc1c144f01f07c49e798ba6ac722c3bce3c9cbae72227a00675214d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAF 5372 bytes
font_01_sfnt_off00008cc2.bin
0686878a669b9bad770d3c7ba3665872802e8f383358380908623b80ee2ee89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC2 10000 bytes

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