Malicious PDF — malware analysis report

Static analysis result for SHA-256 e895f178614db0ac…

MALICIOUS

PDF

55.4 KB Created: 2020-08-21 07:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6188bb6faf59312ba368017ce377794 SHA-1: 0c74b3f43fd19805027303fec2e19ad74c5c3883 SHA-256: e895f178614db0aca322db7bd5a4409b70217a97677d12ee33f714630715a003
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to trick the user into clicking the link. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=annamayya+cinema+patalu+ing
    • http://files.thecalmscribe.ca/uploads/1/3/1/1/131163635/3510169.pdf
    • http://files.angeloffaith777.com/uploads/1/3/1/4/131438348/nesoniziravafapokat.pdf
    • http://files.shamblinstone.com/uploads/1/3/1/4/131411474/9c70598ca1.pdf
    • http://files.thegardenrecipe.com/uploads/1/3/1/3/131398145/widufijudilesi_xusesobojore_damavamenegi_xubekatelow.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/alzheimer_s_disease_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/arbitraje_derecho.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/fuxomafujepedusumufovujul.pdf
    • https://cdn.shopify.com/s/files/1/0434/5643/0230/files/turakupesutulosisowepaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/32192908312.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/8273352406.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/sijoxogumutaboretule.pdf
    • https://cdn.shopify.com/s/files/1/0433/5186/7557/files/speak_softly_love_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/calendar_template_for_mac_pages.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/finilifagumemunepo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/44779023873.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/vatanobififok.pdf
    • https://cdn.shopify.com/s/files/1/0439/9484/1246/files/ridojuxekamepomadudupu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/wilobojegavujujepijuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650a.bin
3100b1d6ca78e9be7fa727742c6694d060e3ba75ed07530f3e65130ccbbac789
pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5068 bytes
font_01_sfnt_off0000763b.bin
7755bb62b5102bd4d51c4bb023b44137b59ce9013698260d37f457441f6eb6cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 17372 bytes
font_02_sfnt_off0000a027.bin
0385a353831cc80eae77c01a75373743e521c114620ba42b4d0a7befd148bedf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA027 14744 bytes