Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcc2a2dd3c1c1a4…

MALICIOUS

PDF

57.6 KB Created: 2020-08-23 02:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c0207ed2c3ecd670008eddafa2e859 SHA-1: 246d4c9940b37e953fd4cbca8592e9c73aba41c0 SHA-256: 9dcc2a2dd3c1c1a4705773f5177fccf78012b5868b05df369fd4a5945b293579
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=sharechat+app++in+telugu+love'. This indicates the document's primary purpose is to lure users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to improve the ranking of malicious content. No scripts were extracted, but the embedded URL is sufficient evidence of a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=sharechat+app++in+telugu+love
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdf
    • http://files.harmonyorganics.net/uploads/1/3/0/8/130874265/jupokulowizoxefebom.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/migori.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/vagipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/14724653058.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/43373252067.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/79248542590.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/lijakozokujipubisasexu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mud_logging_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/deravelaminasomefesubapuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/twitter_gif_to_phone.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/24034835199.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/15872331419.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/17782165905.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043e3.bin
4feb1b969f1d2d7253ece0798077fd61089333e09be564ee9a7dc80ad000d3d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43E3 5180 bytes
font_01_sfnt_off00005587.bin
54d7f31bf32bef0e1b274f205455c6d844ab531a5bc552420b99795e3f19d778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5587 9292 bytes
font_02_sfnt_off00006831.bin
c558338be4346b63be941743d538cccd30d8ddaf36c05daf1016262d52007b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6831 4752 bytes
font_03_sfnt_off00007917.bin
23c7a392225b41024ad91f0c35e196a524d018f94d02bee86d20006cef44471f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 10360 bytes
font_04_sfnt_off00009b39.bin
5c8630674848935f27dcf5890672290c2ada74cdd205dc79c0178d5064cfc827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B39 9484 bytes
font_05_sfnt_off0000bbc7.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC7 16036 bytes
font_06_sfnt_off0000d01e.bin
74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 1736 bytes

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