Malicious PDF — malware analysis report

Static analysis result for SHA-256 1835391187300a33…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 07:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 641072da322f6f17e8816f130739bfc6 SHA-1: e6c89b51e4421affcdcc44313ae5d1031125a610 SHA-256: 1835391187300a33eda148f0cc1317da782627cdf226495ccda12d07df89af94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=panzerblitz+counters+pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous Shopify-hosted PDF links, alongside the malicious redirector, indicates a likely attempt to drive traffic to malicious content.

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.cc/pify?keyword=panzerblitz+counters+pdf
    • http://molovoma.academyofhirudotherapy.org/uploads/1/3/2/8/132814930/ditiso_ruxazeluxiluzem.pdf
    • http://files.anniartscrafts.com/uploads/1/3/2/6/132683088/pegutukururuva_kukadalale_renapubazibago_butadatexul.pdf
    • http://files.bathurstfamilytherapy.com/uploads/1/3/0/7/130775760/beca88967.pdf
    • http://files.lhstv.net/uploads/1/3/1/4/131407012/jemukazigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/latut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/7406329036.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/65239030359.pdf
    • https://cdn.shopify.com/s/files/1/0437/3331/9831/files/dixegidi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8705/0390/files/refixezamufuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/41984304778.pdf
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/duplicate_a_google_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/13145648663.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/zubof.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008086.bin
a8432a7a780d5aa950800a3ff8f75673e633c8ac4183067e4b9344381a579870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 5340 bytes
font_01_sfnt_off000092bd.bin
d67bafecb3acf472a6dc8b3d5d5e55d65d81a5d6fb77abe017186c70137b0d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BD 10248 bytes
font_02_sfnt_off0000b615.bin
d26390a1b495fc4844790f49287189703365677ecb3af67b7cca25d146cf5ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB615 16060 bytes

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