Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0e6215bc8609ff…

MALICIOUS

PDF

34.2 KB Created: 2020-08-10 11:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd2f36d46f04f74c3f4203220408e123 SHA-1: 358504bc898a0c1b696f5e9d571719aab987b55b SHA-256: da0e6215bc8609ff2f99f38417a087ac12f1ba3235c9159bdbb4d8fbb70e198f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning technique designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'addition and subtraction worksheets ks2 pdf' and the malicious URL, reinforcing the lure.

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=addition+and+subtraction+worksheets+ks2+pdf
    • http://files.lichoudds.com/uploads/1/3/1/4/131453100/sivurokapewuv-xalonugiwux-rogem-nivokemavabikem.pdf
    • http://bawox.westlockbutchershop.ca/uploads/1/3/0/8/130874478/1921233.pdf
    • http://files.allwellbreaksloose.com/uploads/1/3/0/7/130776791/1956015.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/71421120504.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2916/files/biophilic_urbanism.pdf
    • https://cdn.shopify.com/s/files/1/0445/2355/2927/files/atomic_habits_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/nazivobuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/breviario_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/fawotibusaxujoromuluxizob.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0155/files/payphone_piano.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/nirelixin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/relic_douglas_preston.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8362/files/22_hebrew_letters_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/41236347846.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/72834799747.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/rabemidajofepi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/vuwaxijifigelaz.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_off000047b8.bin
3671a842c1e7fafbbc1a5257c934141d4f3c40894d16dbfe6da6aec286869a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47B8 5628 bytes
font_01_sfnt_off00005ae7.bin
ed5eab91ad7cf62b4ba28dbdd003c1034b065ac8328a865c6e77e342e2707101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE7 9556 bytes

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