Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2ab01da705f087…

MALICIOUS

PDF

51.5 KB Created: 2020-08-20 09:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b379d41481a2e87e8ed7541fc18a56f7 SHA-1: ae248f14bf4260246da00b998cf415d62b2901ee SHA-256: 5c2ab01da705f087e9e957104b5724533792419e543c16c43d1f1774583adaaa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to SEO-optimized PDF hosting sites, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Amour Sucre episode 23 guide' and the malicious redirector URL, suggesting a lure to drive traffic to malicious infrastructure. 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=amour+sucre+episode+23+guide
    • http://files.smiling-dog-farm.com/uploads/1/3/1/3/131379034/3380568.pdf
    • http://zajarig.thegooddogfoodbank.com/uploads/1/3/1/3/131380213/ruverene-muweb-gozapuvadusenuz.pdf
    • http://files.ofwrealestate.com/uploads/1/3/1/4/131437194/117135786a3.pdf
    • http://files.family1stdpc.com/uploads/1/3/0/9/130969440/c3c5a71.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/smokey_and_the_bandit_soundtrack_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/aritmatika_dasar.pdf
    • https://cdn.shopify.com/s/files/1/0439/6508/7902/files/vafezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/bed_sheet_and_quilt_cover_set.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/49418361992.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/29162092436.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/fivakenaradegusow.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/24041819106.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/lens_flare_png_pack.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/online_to_word_editable_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/xukopebuvatomufazemot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/20058774073.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/51673308418.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9709/files/avatar_musik_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/kuzavutos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1a.bin
6088cac1e70cde7d7fcf28e08fccbfbf422b9173f6523f49d91374c4389c1eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 2364 bytes
font_01_sfnt_off00007514.bin
2b79d1e9d2519a8215f426ca9658435f6e5882735eb8c862bb1138a493310df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 5436 bytes
font_02_sfnt_off00008780.bin
22ff86eee214b03aba96e9913b8924b3711c69b456bf2c2e70698df674193419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8780 10352 bytes
font_03_sfnt_off0000ab25.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB25 16144 bytes

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