Malicious PDF — malware analysis report

Static analysis result for SHA-256 14da368d289c3786…

MALICIOUS

PDF

47.7 KB Created: 2020-08-02 16:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a563539ceffd182ff44d78d56720936d SHA-1: cc1f5b5385ed13928b5b79641c73c1ffaa8b7407 SHA-256: 14da368d289c378638596bee8c333d32bda2b763eb62ec2b3719cca16a85f40a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm, potentially for SEO manipulation or distributing further malicious content, indicated by the numerous Shopify and other file hosting links.

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=3ds+cia+apps
    • http://files.fairytaleweddingvenue.com/uploads/1/3/0/8/130874085/seserutafivimalaweku.pdf
    • http://files.toddhirsch.com/uploads/1/3/1/3/131384721/7047937.pdf
    • http://files.merrywandererteaching.com/uploads/1/3/1/3/131384636/mabenid_worife.pdf
    • http://files.charismanorwich.co.uk/uploads/1/3/2/7/132741334/8ca062.pdf
    • http://files.shenmindandbody.com/uploads/1/3/0/7/130775520/1423454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/vakulusowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/31671822351.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/lupewemufosozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/wejoriximodifaropujuzufek.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/66841567975.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/siwuwufikekik.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/83000266209.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/dapalokikexaletoriraxid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/55020742003.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/2953885250.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/24390977367.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/56458315578.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_off00007ddb.bin
ced1e8416c4bb8bb8cf3294d7f5a241fe262bf3d53a2e5ffc1268b068e42f5e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDB 5008 bytes
font_01_sfnt_off00008ef2.bin
f11bb066e6e8ac08d5b3d34857a4e7844a5cd22cc361fbc447bf5dbee9bd4f5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF2 10180 bytes