Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b1e3587423fa7e…

MALICIOUS

PDF

46.0 KB Created: 2020-08-01 01:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d1c0f0a541141e6a2faed2d16aa38b9 SHA-1: 1a0594f5a0593d16e352e2641e5396f3519959ab SHA-256: 41b1e3587423fa7e89cb2b6ff1bbc231560d2d6ca65123d6e0f71eb2b14e160c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/pify?keyword=400ex+service+manual+pdf. The document body, though heavily obfuscated, contains text related to a service manual, suggesting a lure. The presence of a link farm further indicates an attempt to manipulate search engine results or distribute malicious content. 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.com/pify?keyword=400ex+service+manual+pdf
    • http://files.devonicity.ca/uploads/1/3/2/7/132740361/xolimumofumatib-kenute-kolorunul-nogefexib.pdf
    • http://files.gslpreschool.org/uploads/1/3/0/7/130740496/eae4f3aacb9b521.pdf
    • http://files.bgsufalcon4n6.com/uploads/1/3/1/4/131437172/dagojowerub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/kibisiwesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/xexuburekazopev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/wabisisofub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0265/files/nixuwifewawovebogut.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/85191278648.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/tujisogulefepisixaxogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/nepupexojobufadazexur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/nasimosezeguwuzodanawak.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/pobiselexojovozatukizamaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/vigagugifegiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/jakudexir.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/fetch_post_form_data.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/bikiziwuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/19224177549.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/jogexesawomi.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_off00005e1f.bin
174dd801e29af5317a6bd2ab459e21be5bddbca77729236bc2b0c0780350f719
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1F 5256 bytes
font_01_sfnt_off00006fde.bin
12e5266120479a0affe3c39133d79adc640a93fb510e1b9e776602f4d43f84da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 14356 bytes
font_02_sfnt_off00009d03.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D03 4324 bytes