Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b86200697e6a8ba…

MALICIOUS

PDF

43.6 KB Created: 2020-08-11 20:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2bf8144192d5aba7ecca72fa9dad6de SHA-1: 436d95ed7b0615202cbd2d8e88fcedd538815f72 SHA-256: 1b86200697e6a8ba40afa27163108237c6086083221d96eeb3a7ff4ed3ee4a20
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently leading to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Nissan almera n16 owners manual pdf' and the URL itself, suggesting a lure. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or redirection 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/pify?keyword=nissan+almera+n16+owners+manual+pdf
    • http://masasive.kathiesharkey.com/uploads/1/3/1/3/131384635/5734315.pdf
    • http://files.norcalskindivers.com/uploads/1/3/1/6/131606854/7e51e.pdf
    • http://files.encyclopediasonica.com/uploads/1/3/1/4/131437886/b4ff2.pdf
    • http://files.austindrexler.com/uploads/1/3/1/4/131453684/kininewuwukali-lofuxobiwup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/tedifoxunuras.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/cradle_of_rome.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/komisar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/possessivpronomen_tabelle_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/15699158916.pdf
    • https://cdn.shopify.com/s/files/1/0452/1931/5872/files/devi_bhagavatam_telugu_mohan_publications.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/49931450936.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/89816248136.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/nigodeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/fobodazemitopowobozavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/79976700631.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/58330384713.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/kodis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/waviviseg.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_off00005f77.bin
3c59cab4cd83257a17a5a70ab4d1e77db1d1e2be2e23ab8cef65d60ac8b4dbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 5452 bytes
font_01_sfnt_off00007200.bin
80bdca01d4cede0ca204c91b9e067345c54de136110cca7b83d3df8f6cdb6f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 15452 bytes

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