Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e7c7b8dec0f170…

MALICIOUS

PDF

94.5 KB Created: 2020-08-08 16:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d88dd1340af21b621ecf613685b08866 SHA-1: 7f6795f38c504281febdae8ac582965b05420efc SHA-256: 45e7c7b8dec0f17059a020d85d214b1e1249a33fdeaac58f3826741cec6e01f3
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL points to a redirector service, likely designed to obscure the final malicious destination. No scripts were extracted from this sample, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malware distribution attempt.

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=aircraft+landing+gear+pdf
    • http://files.missoulaclimate.org/uploads/1/3/1/0/131069968/dd284475c02.pdf
    • http://files.thevillasatpleasantvalley.com/uploads/1/3/1/8/131856173/10b65321d8.pdf
    • http://lukatem.literaturewithleonetti.com/uploads/1/3/1/4/131454065/jatefiruroputipasa.pdf
    • http://poteti.ocmulgeeblacksmithsguild.org/uploads/1/3/1/4/131407227/zovulojoxevex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/zezeluxoxuwelitex.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/53961914768.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/mp3_converter_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/dieta_para_bajar_de_peso_y_aumentar_masa_muscular.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/wosulipipaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/nexedizekupovuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3257/files/definition_leadership_styles.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/acomaf_vk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/fusajepevawajuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/36484601572.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/mcdonalds_coupons_ontario.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/44679780614.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ec6.bin
7d6a73f164d293d7adb9a4d522f669680c661a49966404ed9d21804805222a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC6 3184 bytes
font_01_sfnt_off00012a24.bin
0d30bfc2a266be6277e0a40b9886ef38d2e85d4cf57f0023a2c29341ce99e199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A24 4812 bytes
font_02_sfnt_off00013a79.bin
5e0a0a70e711dc1cd806daa7984b12ed0d2c26cacb334af9a3f712da0365f141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A79 10456 bytes
font_03_sfnt_off00015e39.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E39 4324 bytes

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