Malicious PDF — malware analysis report

Static analysis result for SHA-256 054ed5832fe2b27e…

MALICIOUS

PDF

49.9 KB Created: 2020-09-01 18:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7470312509016350d55c6198f9cc04da SHA-1: 6609b6f0101c136c15a33250f64d2deaafb2584b SHA-256: 054ed5832fe2b27e33e80dfeacf76a049fa3001afb42a4f9e483ed361e69611a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one prominently leading to a redirector URL associated with malicious activity. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

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.club/wix?keyword=android+architecture+components+sample+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8eb7c0c4a5ac4d84ac2deba233118111.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fea06aa38c4ce8bc87f5a3bba3301c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddf5f9b00c734c4c8da90ac4924426b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_49723570578744938ae893b0c9c2b14f.pdf
    • https://static.usrfiles.com/ugd/41a0b6_3ba6eb0b42cb4e818cc718cafba676cb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/25056294118.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/36911387742.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5690/files/81304998791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/mulivaveg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4284/8413/files/3_phase_alternator_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/saguxemoxolep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/dowry_prohibition_act_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4971/files/zefegexunotoxomak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/the_bacchae_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/past_simple_vs_present_perfect_exercises_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83406059157.pdf
    • https://cdn.shopify.com/s/files/1/0440/7348/4438/files/dch_baby_i.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_off0000831e.bin
73747dbb85c6d8786495e65a00b7ec6f6664d50dcbb765139999a6925032a7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831E 5300 bytes
font_01_sfnt_off000094f7.bin
0159c6b368d5e43232206d9654526cc574a2983579c21a9570291082e596e6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F7 10904 bytes

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