Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1da9656e878822…

MALICIOUS

PDF

51.9 KB Created: 2020-08-12 14:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dfa529e534e9829ccfc2a78a519e380 SHA-1: 3f7ff8666c553e924adc8088f42663c5122e3bd4 SHA-256: 7b1da9656e8788227e22dd93ee078327564e1100f956e05af5ec870510fc2cbd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to the 'union budget 2019 pdf'. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or malware distribution attempt. No scripts were extracted from this sample.

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/wb?keyword=highlights%20of%20union%20budget%202019%20pdf
    • http://files.gccak.com/uploads/1/3/2/6/132695339/1533876.pdf
    • http://fogibi.handsfeetandwings.candletothesun.com/uploads/1/3/2/6/132681464/wubusifak_bomivasixivid_wufureju.pdf
    • http://files.gilaridgeceramics.com/uploads/1/3/0/8/130813428/nipolulo_ladera_webezerejuli.pdf
    • http://files.sycamorebandandorchestra.com/uploads/1/3/1/0/131070289/d11c8936.pdf
    • http://rirub.calconref.org/uploads/1/3/1/4/131454065/vamikuku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/mekawixamale.pdf
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/atoms_molecules_and_ions_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/6615323438.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/bautagebuch_bg_bau.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/english_speaking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/biochemistry_mbbs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/11081728646.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/tesuxezuburatixezeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/rijisufoligakuzikovufewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/83116840759.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8173/files/sanguine_temperament.pdf
    • https://cdn.shopify.com/s/files/1/0432/9911/1070/files/16599469007.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/mamasudovurikipimog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dc2.bin
795c7b28f9215a4e9e042d0c0b5e8fc3da6dd2d9fd33098f73a28afadd33392f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC2 5460 bytes
font_01_sfnt_off00009053.bin
b4a09a93825dbe52adf74a0da7725b8e2b66c25803b3507efdba2f849d85530e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9053 10648 bytes
font_02_sfnt_off0000b488.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB488 4324 bytes

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