Malicious PDF — malware analysis report

Static analysis result for SHA-256 66abeced74d3159b…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 06:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e98410e1847f8703e6d2f1aed7eb1730 SHA-1: 3d0ad2cc9e699e8c7b561684764dcdf7afd7be65 SHA-256: 66abeced74d3159b836f6615a3dccf216df86829f0efdd75ac5c18a8e1ae0ad3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector, which is a common tactic for distributing malware or phishing pages. The document body explicitly mentions 'antistress full version apk' and links to a URL that appears to be part of a link farm designed to attract search engine traffic, further suggesting a malicious intent to lure users to potentially harmful content.

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=antistress+full+version+apk
    • http://watod.elancommunities.com/uploads/1/3/1/0/131070786/6a764.pdf
    • http://jilin.stephaneheaume.com/uploads/1/3/1/8/131857101/nopawukixigojor.pdf
    • http://gedirox.hanamadecrafts.com/uploads/1/3/0/8/130874493/woseduwetasa.pdf
    • http://jajut.moonlightbellydance.com/uploads/1/3/1/0/131070674/79d95c9f.pdf
    • http://files.travelreiters.com/uploads/1/3/2/7/132740619/jaxigojiwoliwos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/zejugapijuzipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/22101690783.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/boston_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/rotitelanamegoro.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/fewepevuwexel.pdf
    • https://cdn.shopify.com/s/files/1/0466/8008/0549/files/huawei_p9_lite_2017_update_android_8.pdf
    • https://cdn.shopify.com/s/files/1/0450/2811/4582/files/asbaq_e_tareekh_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/lokafimovotabofetorufinog.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/watch_the_avengers_movie_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/agile_maturity_model.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/guzudutap.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca9.bin
39a7cc0d2db2fd1ebbf717c0b7f2280a20a431bb7250483b3c3e11676bbdcc17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 5008 bytes
font_01_sfnt_off00006dcb.bin
3e99f933e8b71488c7b92cf8f96a5ad462fd13766626759882b20427ffc568ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 10004 bytes

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