Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd876bd39f97573b…

MALICIOUS

PDF

48.6 KB Created: 2020-08-26 18:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f0832c8021045bba3d526e3c0ae0f7 SHA-1: 9fd02efcea72621880f260b622e3ee767e9a947d SHA-256: fd876bd39f97573b75089591e57f33344406ca18a63dbd530b5fc7fe44ba70e6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=newark+garden+hotel'. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=newark+garden+hotel
    • http://files.westbrookbromham.co.uk/uploads/1/3/1/3/131384429/2affec0666.pdf
    • http://files.jenswanndowney.com/uploads/1/3/0/9/130969150/wodelo.pdf
    • http://files.new-condo-launch.com/uploads/1/3/2/7/132710678/vimivapovaf-lapelade.pdf
    • http://files.gunlac.org/uploads/1/3/1/0/131070375/6099840.pdf
    • https://cdn.shopify.com/s/files/1/0435/7308/4319/files/itunes_64_bit_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/4797/1990/files/buku_agama_islam_kelas_12_kurikulum_2020_penerbit_erlangga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/54297166252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/3121711567.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/www._akaipro._com_softwaredownload.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/98159668318.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/alaporan_tamilan_video_song_starmusiq.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/coleman_air_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/alcohols_phenols_and_ethers_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/xizowozerisasebidege.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/92340377121.pdf
    • https://cdn.shopify.com/s/files/1/0438/6501/4437/files/2440575897.pdf
    • https://cdn.shopify.com/s/files/1/0459/1832/2839/files/52505254629.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_off00007f65.bin
f6ae2b10af267e96b59945458ce5769b7432c9380e7c71b8044756294340ffb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 5036 bytes
font_01_sfnt_off00009091.bin
0dcdcbb913a04462f70015399bb0f0a750218b8d52139b45bac4336db4b9844a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 10900 bytes

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