Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c2cd37f695393a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 11:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f105cf868325857dc6e52ad1fc644293 SHA-1: e5d230e3115fd85e1322564bd3d52ca74a15b671 SHA-256: 75c2cd37f695393ad39a3953e8ee95fa4bdad8907d7fc4b67f7d5edfba1de2b7
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though corrupted, contains text suggesting it is a manual for an 'Android one mi a1'. The primary malicious IOC is the redirector URL, which is used to lure users to potentially harmful content. The ML classifier strongly supports the malicious verdict.

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=android+one+mi+a1+manual
    • http://zasafomil.placementandbusiness.com/uploads/1/3/0/8/130874493/0ef3f0993ec5fd6.pdf
    • http://files.albertsstamps.com/uploads/1/3/0/8/130874086/5e64ed9.pdf
    • http://files.brookeellenlouttit.com/uploads/1/3/1/4/131406149/a936ba4abe.pdf
    • http://files.nikepalmettocupsc.com/uploads/1/3/0/9/130969873/rezilajaxob_tuman_banededetuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/pemegeluturatidulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/13391655316.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/moving_house_card_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/processing_image_manipulation.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/20011044268.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4536/files/63825836649.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/74401174744.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/57570407211.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/dejatetodafibonezepodepuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/87625159971.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/somany_bathroom_fittings_price_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669a.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 3724 bytes
font_01_sfnt_off000073d7.bin
7b364a7b83aecf51924888747632410004594e08abbe7122283e1b84e9def939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 4836 bytes
font_02_sfnt_off00008428.bin
8181ab4222f44aaf1643b62cb501547f0669889eda0fcfc122a40cd5f81c29ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 10376 bytes

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